-密度控制系统在鸿源选煤厂的应用 -

通过对PLC系统、密度测量系统、密度控制系统的详细介绍,阐明了TD-20密度控制系统的的组成、功能及理论依据,系统PLC采用西门子S7 300系列,CPU选用适于中等程序处理量的314型号,控制程序采用PID控制理论,通过阿姆德尔同位素密度计在线测量悬浮液密度。该系统在鸿源选煤厂应用后,悬浮液密度控制精度达到了0.5%,实现了对悬浮液密度高精度控制的同时,优化了其它各选煤工艺参数,确保了产品的灰分及回收率等指标,实现了良好的经济效益。 Introduce PLC system,density measure and control system,analyse the composition,function and theoretical basis of TD-20 density control system.Its PLC system adopts Siemens S7 300 series,the model of CPU is 314 which is more suitable for medium program processing capacity,PID control theory is used to regulate program,the suspension density could be on-line measured with Amdahl isotope densimeter.With the help of this system,the density control precision reaches up to 0.5 percent,ash content and recovery meet the requirement,other coal preparation technological parameters are optimized.This system helps to improve the economic benefits